One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(4,6)(8,9)(11,12,16,14)(13,17,19,21)(15,18,23,22)(20,24,25,26)(7,8,10,9)(13,19)(15,23)(17,21)(18,22)(3,4,5,6)(7,9,10,8)(11,13)(12,17)(14,21)(15,20)(16,19)(18,24)(22,26)(23,25)(11,14,16,12)(13,17,19,21)(15,22,23,18)(20,24,25,26)(11,15)(12,18)(13,20)(14,22)(16,23)(17,24)(19,25)(21,26) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.